- The purpose of this lab is to prepare a test solution for carbon dioxide.
MATERIALS NEEDED:
Lime (used in making pickles)
Tablespoon
2 glass quart jars with lidsPROCEDURE:
Fill one jar with water.
Add 1 tablespoon of lime and stir.
Secure the lid; allow the solution to stand overnight.
Decant (pour off) the clear liquid into the second jar. Be careful not to pour any of the lime that has settled on the bottom of the jar.
Keep the jar closed. This limewater will be used in other experiments to test for the presence of carbon dioxide.Label the jar, Limewater.RESULTS:
- The liquid is milky white and opaque at first. Large particles of lime start to precipitate. Precipitate means to fall downward. After standing overnight the liquid is very clear.
- The undissolved particles of lime are temporarily suspended in the water, making it appear milky. It takes time for all the tiny particles to settle. The clear liquid is a saturated solution of limewater. It must be covered to prevent carbon dioxide in the air from dissolving in it.
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- The liquid is milky white and opaque at first. Large particles of lime start to precipitate. Precipitate means to fall downward. After standing overnight the liquid is very clear.
LIMEWATER
INTRODUCTION: